INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 1 PID: 14685 Comm: syz-executor.0 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 assign_lock_key+0x134/0x140 kernel/locking/lockdep.c:979 register_lock_class+0xc4/0x2f8 kernel/locking/lockdep.c:1292 __lock_acquire+0xa8/0x30a4 kernel/locking/lockdep.c:4932 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] __fib6_clean_all+0xf0/0x2c4 net/ipv6/ip6_fib.c:2256 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2268 rt6_sync_down_dev net/ipv6/route.c:4894 [inline] rt6_disable_ip+0x80/0xc8 net/ipv6/route.c:4899 addrconf_ifdown+0x90/0xc30 net/ipv6/addrconf.c:3750 addrconf_notify+0x218/0x848 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x7c/0x108 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10250 [inline] netdev_run_todo+0x340/0x6f0 net/core/dev.c:10364 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:147 tun_detach drivers/net/tun.c:704 [inline] tun_chr_close+0xe8/0xfc drivers/net/tun.c:3455 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x26c/0xbe0 kernel/exit.c:795 do_group_exit+0x70/0xe8 kernel/exit.c:925 get_signal+0xb0c/0xb40 kernel/signal.c:2857 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 14685 at net/ipv6/ip6_fib.c:2068 fib6_walk_continue+0x278/0x2b0 net/ipv6/ip6_fib.c:2068 Modules linked in: CPU: 1 PID: 14685 Comm: syz-executor.0 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : fib6_walk_continue+0x278/0x2b0 net/ipv6/ip6_fib.c:2068 lr : fib6_walk_continue+0x278/0x2b0 net/ipv6/ip6_fib.c:2068 sp : ffff80001fbbb790 x29: ffff80001fbbb790 x28: 0000000000000000 x27: ffff0000e5721000 x26: ffff0000e5312510 x25: ffff0000e5721018 x24: ffff0000e5312510 x23: ffff0000e5312520 x22: ffff0000e5311a80 x21: ffff80000b765440 x20: 0000000000000000 x19: ffff80001fbbb7f8 x18: 0000000000000162 x17: 6e69676e45206574 x16: 0000000000000202 x15: 0000000000000000 x14: 0000000000000000 x13: 205d353836343154 x12: 5b5d313336323838 x11: ff8080000b77912c x10: 0000000000000000 x9 : ffff80000b77912c x8 : ffff0000e77e3500 x7 : 545b5d3133363238 x6 : ffff80000b777988 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000e77e3500 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: fib6_walk_continue+0x278/0x2b0 net/ipv6/ip6_fib.c:2068 fib6_walk net/ipv6/ip6_fib.c:2161 [inline] fib6_clean_tree net/ipv6/ip6_fib.c:2241 [inline] __fib6_clean_all+0x16c/0x2c4 net/ipv6/ip6_fib.c:2257 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2268 rt6_sync_down_dev net/ipv6/route.c:4894 [inline] rt6_disable_ip+0x80/0xc8 net/ipv6/route.c:4899 addrconf_ifdown+0x90/0xc30 net/ipv6/addrconf.c:3750 addrconf_notify+0x218/0x848 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x7c/0x108 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10250 [inline] netdev_run_todo+0x340/0x6f0 net/core/dev.c:10364 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:147 tun_detach drivers/net/tun.c:704 [inline] tun_chr_close+0xe8/0xfc drivers/net/tun.c:3455 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x26c/0xbe0 kernel/exit.c:795 do_group_exit+0x70/0xe8 kernel/exit.c:925 get_signal+0xb0c/0xb40 kernel/signal.c:2857 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 6986 hardirqs last enabled at (6985): [] __local_bh_enable_ip+0x13c/0x1a4 kernel/softirq.c:401 hardirqs last disabled at (6983): [] __local_bh_enable_ip+0xc4/0x1a4 kernel/softirq.c:378 softirqs last enabled at (6984): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (6984): [] clusterip_netdev_event+0x188/0x1ac net/ipv4/netfilter/ipt_CLUSTERIP.c:233 softirqs last disabled at (6986): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (6986): [] __fib6_clean_all+0xf0/0x2c4 net/ipv6/ip6_fib.c:2256 ---[ end trace 0000000000000000 ]--- Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 Mem abort info: ESR = 0x0000000096000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000001091dd000 [00000000000000a0] pgd=0800000109073003, p4d=0800000109073003, pud=080000010ccea003, pmd=080000010aab3003, pte=0000000000000000 Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 14685 Comm: syz-executor.0 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mutex_lock_common+0x78/0xca8 kernel/locking/mutex.c:582 lr : __mutex_lock_common+0x6c/0xca8 kernel/locking/mutex.c:580 sp : ffff80001fbbb900 x29: ffff80001fbbb970 x28: ffff80000ee2b000 x27: ffff80001fbbbaa8 x26: 0000000000000000 x25: 0000000000000001 x24: 0000000000000002 x23: ffff80000b4689d8 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000040 x18: 0000000000000189 x17: 000000000000b67e x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 000000000000000b x12: ffff80000d8094f0 x11: ff8080000b44ee74 x10: ffff80000d309358 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : ffff80000b4689d8 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 00000000ffffffff x0 : 0000000000000000 Call trace: __mutex_lock_common+0x78/0xca8 kernel/locking/mutex.c:582 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 nf_tables_flowtable_event+0x60/0x1bc net/netfilter/nf_tables_api.c:8160 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x7c/0x108 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10250 [inline] netdev_run_todo+0x340/0x6f0 net/core/dev.c:10364 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:147 tun_detach drivers/net/tun.c:704 [inline] tun_chr_close+0xe8/0xfc drivers/net/tun.c:3455 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x26c/0xbe0 kernel/exit.c:795 do_group_exit+0x70/0xe8 kernel/exit.c:925 get_signal+0xb0c/0xb40 kernel/signal.c:2857 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: 970671c3 b001735c b94a2b88 35000088 (f9403268) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 970671c3 bl 0xfffffffffc19c70c 4: b001735c adrp x28, 0x2e69000 8: b94a2b88 ldr w8, [x28, #2600] c: 35000088 cbnz w8, 0x1c * 10: f9403268 ldr x8, [x19, #96] <-- trapping instruction